Add release job for kpi-tracker.

.github/workflows/release-kpi-tracker.yml

@@ -0,0 +1,52 @@
+name: Publish a docker image for KPI-tracker to DockerHub.
+
+on:
+  push:
+    tags:
+      - kpi-tracker/*.*.*
+
+env:
+  REGISTRY: docker.io
+  IMAGE_NAME: kpi-tracker
+
+jobs:
+  publish-docker-image:
+    runs-on: ubuntu-latest
+    environment: testnet-deployments
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      # Uses the `docker/login-action` action to log in to the Container registry.
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Extract version tag from Cargo.toml manifest.
+        id: meta
+        run: |
+          export VERSION=$(yq .package.version kpi-tracker/Cargo.toml)
+          export FULL_IMAGE_TAG="${{ env.REGISTRY }}/concordium/$IMAGE_NAME:$VERSION"
+          echo "::notice FULL_IMAGE_TAG=${FULL_IMAGE_TAG}"
+          # Make sure the image does not exist. Abort if we can retrieve any metadata.
+          if docker manifest inspect ${FULL_IMAGE_TAG} > /dev/null; then
+             echo "::error ${FULL_IMAGE_TAG} already exists"
+             exit 1
+          elif [ ! "${{ github.ref_name }}" = "kpi-tracker/${VERSION}" ]; then
+             echo "::error Expected tag ${EXPECTED_TAG} does not match the version ${VERSION}."
+             exit 1
+          else
+             # Store the full image tag into a tag variable for the following step.
+             echo "tag=${FULL_IMAGE_TAG}" > "$GITHUB_OUTPUT"
+          fi
+      - name: Build and push Docker image
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: .
+          file: ./kpi-tracker/scripts/Dockerfile
+          push: true
+          platforms: linux/amd64
+          tags: ${{ steps.meta.outputs.tag }}

kpi-tracker/scripts/Dockerfile

@@ -1,10 +1,6 @@
-ARG build_image
-ARG base_image
+ARG build_image=rust:1.74-bookworm
+ARG base_image=debian:bookworm
 FROM ${build_image} AS build
-# Install protoc
-RUN wget https://github.com/protocolbuffers/protobuf/releases/download/v3.15.3/protoc-3.15.3-linux-x86_64.zip
-RUN unzip protoc-3.15.3-linux-x86_64.zip
-RUN mv ./bin/protoc /usr/bin/protoc
 
 WORKDIR /build
 COPY ./kpi-tracker ./src